Steering control apparatus
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United States of America Patent
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Apr 30, 2013
Grant Date -
Feb 9, 2012
app pub date -
Aug 4, 2011
filing date -
Aug 6, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
In a steering control apparatus, a worm gear is configured to have a lead angle for a self-lock operation, by which a worm wheel is allowed to rotate by rotation of a worm but the worm is not allowed to rotate by rotation of the worm wheel. Thus, a lock mechanism need not be provided separately from a gear mechanism and the apparatus is reduced in entire size. A VGRS control part checks whether the worm gear has a self-lock failure, which disables the self-lock operation. If the worm gear has the self-lock failure, idling suppression processing is performed to suppress idling of a steering wheel. Thus, even when the self-lock failure arises, the steering wheel is suppressed from idling.
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